read config file use c

readparam.c

#include "readparam.h"

char* delblank( char* str )
{
    char* out = str;
    int i, j;
    for( i = 0, j = 0; i < strlen( str ); i++,j++ )
    {
        if( str[i] == ' ' || str[i] == '\n')
        {
            j--;
            continue;
        }
        out[j] = str[i];
    }
    out[j] = '\0';
    return out;
}

Param* find_param( Param* params, char* name )
{
    Param* temp;
    HASH_FIND_STR( params, name, temp );
    if( temp == NULL )
    {
        printf( "wrong key: %s!\n", name );
    }
    return temp;
}


#if DEBUG
int main( int argc, char** argv )
#else
Param* read_params( char* fn )
#endif
{
    FILE* fp;
    char* line = NULL;
    size_t len = 0;
    ssize_t read;

    char* delim = ";";
    char* subdelim = ":";
    int count = 0, i = 0;
    char *str1, *str2, *token, *subtoken;
    char *saveptr1, *saveptr2;

    Param* params = NULL;
    Param* temp = NULL;

#if DEBUG
    char* fn = argv[1];
#endif
    fp = fopen( fn, "r" );
    if ( fp == NULL )
    {
        return NULL;
    }

    Param* s;
    while( (read = getline( &line, &len, fp )) != -1 )
    {
//        printf( "remove spaces: %s\n", delblank(line) );
        for( count = 1, str1 = delblank(line); ; count++, str1 = NULL )
        {
            token = strtok_r( str1, delim,  &saveptr1 );
            if( token == NULL )
                break;

            str2 = token;
            subtoken = strtok_r( str2, subdelim, &saveptr2 );
            if ( subtoken == NULL )
                continue;

            temp = ( Param* ) malloc( sizeof(Param) );

            strcpy( temp->name, subtoken );
            str2 = NULL;
            subtoken = strtok_r( str2, subdelim, &saveptr2 );
            if ( subtoken == NULL )
                continue;
            temp->value = atoi( subtoken );

            HASH_ADD_STR( params, name, temp );
        }
    }
    for ( s = params; s != NULL; s = s->hh.next )
    {
        printf( "%s: %d\n", s->name, s->value );
    }
#if DEBUG
    printf( "find width's value:%d\n", find_param( params, "width" )->value );
#endif

    free( line );
    fclose( fp );
    return params;
}

void release_params( Param* params )
{
#if DEBUG
    printf( "release now!\n" );
#endif
    Param *current, *tmp;
    if( params == NULL )
    {
        printf( "empty!\n" );
        exit( -1 );
    }

    HASH_ITER(hh, params, current, tmp )
    {
        HASH_DEL( params, current );
        free( current );
        current = NULL;
    }
#if DEBUG
    printf( "release end!\n" );
#endif
}